KS30: Where Rubber Meets the Road (Flexible Frame)

KS30: Where Rubber Meets the Road (Flexible Frame)

The flexible keyframe is slightly lighter built and less taut than the stiff keyframe. "Stiff" describes a construction that resists collapse. With keyframe fully loaded, glidebolts can be retracted so that none touch. The balancerail may sag and stress a little in this state, but its entire length will remain elevated. The flexible keyframe, however, will relax to the keybed. Most European/American keyframes...
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KS 29: Where Rubber Meets the Road (Stiff Frame)

KS 29: Where Rubber Meets the Road (Stiff Frame)

I'd like to briefly look again at where keyframe meets keybed. It's the foundation of our regulating, but because not much of what's at play can actually be seen or directly accessedwe are challenged to apply what we think and see what happens. And thinking evolvesI am familiar with at least four categories of keyframe bedding: the shimmed and securely fastened upright, the full-fitting/no-glidebolt grand, the stiff Steinway/Mason style grand, and the more flexible Yamaha/Kawai style grand. The upright keyframe has...
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